检索结果-南通市图书馆

Aqueous Geochemistry and Limnology of the Sleeper Pit Lake, Nevada, USA: Evidence for Long-Term Subaqueous Solute Generation in Mine Pit Lakes

引用

Journal of Geoscience and Environment Protection 2019年第3期7卷 64-81页

作者： Connor P. Newman Tyler Cluff thomas gray Geoff Beale Nevada Division of Environmental Protection Carson City NV USA Piteau Associates Reno NV USA Piteau Associates Shrewsbury UK

Predictive geochemical and limnologic modeling of pit lakes is an important aspect of modern mine-site permitting. One of the key assumptions of many predictive pit-lake models is that open-pit high walls and in-pit backfill become geochemically unreactive once submerged by the filling pit lake. Existing pit lakes provide useful data to test this assumption. The Sleeper pit lake (northwestern Nevada, USA) is approaching hydrologic equilibrium and contains good-quality water that generally meets regulatory requirements for pit lakes. Despite the overall stable geochemical composition, seasonal trends in the hypolimnion indicate the generation of dissolved metals associated with the ore deposit (e.g., Mn and Zn) and cyclical variations in pH. This study applies mass balance, analysis of subaqueous pyrite oxidation, and trends in solute concentrations to evaluate the potential causes of long-term solute generation in the hypolimnion of the Sleeper pit lake. Three separate conceptual models (subaqueous pyrite oxidation;redox reactions;and diffusion of solutes from a permanently stratified bottom layer) were tested against the high-quality dataset available for the pit lake. Evaluation of the monitoring dataset for the pit lake indicates that the Sleeper pit lake has variable limnologic behavior, wherein the lake is consistently stratified (meromictic) in some years, while it undergoes full mixing (holomixis) in other time periods. Comparison of the data with the three conceptual models illustrates that none of these models can be completely implicated as causing the seasonal geochemical variations in the bottom of the pit lake, but that a combination of the processes is likely partially responsible. Additional data collection including sediment cores and in-situ pore-water analysis would aid in understanding geochemical processes occurring over time.

关键词： Mine Pit Lakes Limnology Subaqueous Sulfide Oxidation Redox Reactions Meromixis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Wireless data management system for environmental monitoring in livestock buildings

引用

Information Processing in Agriculture 2017年第1期4卷 1-17页

作者： James gray thomas M.Banhazi Alexander A.Kist Faculty of Health Engineering and SciencesUniversity of Southern Queensland(USQ)West StreetToowoombaQLD 4350Australia National Centre for Engineering in Agriculture(NCEA) University of Southern Queensland(USQ)West StreetToowoombaQLD 4350Australia

The impact of air quality on the health,welfare and productivity of livestock needs to be considered,especially when livestock are kept in enclosed *** monitoring of such environmental factors allows for the development of appropriate strategies to reduce detrimental effects of sub-optimal air quality on the respiratory health of both livestock and *** 2009,an environmental monitoring system was designed,developed and tested that allowed for the monitoring of a number of airborne *** limitation of the system was the manual collection of logged data from each *** paper identifies limitations of the current environmental monitoring system and suggests a range of networking technologies that can be used to increase *** is taken for the networking of environmental monitoring units,as well as the collection of recorded ***,the design and development of a software system that is used to collate and store recorded environmental data from multiple farms is *** order to design such a system,simplified software engineering processes and methodologies have been *** main steps taken in order to complete the project were requirements elicitation with clients,requirements analysis,system design,implementation and finally *** outcome of the project provided a potential prototype for improving the environmental monitoring system and analysis informing the benefit of the implementation.

关键词： Sensors Environmental monitoring Networking Software engineering

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Field Observations of the Vulnerable Impressed Tortoise, Manouria impressa, from Southern Laos and Notes on Local Chelonian Trade

引用

Asian Herpetological Research 2013年第2期4卷 151-154页

作者： thomas CALAME thomas N. E. gray Martha HURLEY Robert J. TIMMINS Khamhou THONGSAMOUTH WWF Greater Mekong House No. 39Unit 05Ban SaylomVientianeLao PDR Société d'Histoire Naturelle Alcide-d'Orbigny 57rue de Gergovie63170 AubièreFrance Global Wildlife Conservation

Observations of wild chelonians in Indochina are uncommon with most records and specimens coming from the commercial wildlife trade. During the surveys of the Xe Sap National Protected Area in southern Laos between February and May 2012, four impressed tortoises, Manouria impressa(IUCN Red List: Vulnerable) were found in three separate field locations. There are few published observations of this species in the wild. We also present data on threats and local value of chelonians in the wildlife trade.

关键词： Xe Sap National Protected Area Laos Manouria impressa wildlife trade

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Epigenetics of gastroenteropancreatic neuroendocrine tumors:A clinicopathologic perspective

引用

World Journal of Gastrointestinal Oncology 2017年第9期9卷 341-353页

作者： Brendan M Finnerty Katherine D gray Maureen D Moore Rasa Zarnegar thomas J FaheyⅢ Department of Surgery New York Presbyterian HospitalWeill Cornell MedicineNew YorkNY 10065United States

Gastroenteropancreatic neuroendocrine tumors(GEP-NETs) are a heterogeneous group of rare tumors whose site-specific tumor incidence and clinical behavior vary widely. Genetic alterations associated with familial inherited syndromes have been well defined; however, the genetic profile of sporadic tumors is less clear as their tumorigenesis does not appear to be controlled by classic oncogenes such as P53, RB, or KRAS. Even within GEP-NETs, there are no common oncogenic drivers; for example, DAXX/ATRX mutations are strongly implicated in the tumorigenesis of pancreatic but not small bowel NETs. Accordingly, the dysregulation of epigenetic mechanisms has been hypothesized as a potential regulator of GEPNET tumorigenesis and has become a major focus of recent studies. Despite the heterogeneity of tumor cohorts evaluated in these studies, it is obvious that there are methylation patterns, chromatin remodeling alterations, and microR NA and long non-coding RNA(lncR NA) differential expression profiles that are distinctive of GEPNETs, some of which are correlated with significant differences in clinical outcomes. Several translational studies have provided convincing data identifying potential prognostic biomarkers, and some of these have demonstrated preliminary success as serum biomarkers that can be used clinically. Nevertheless, there are many opportunities to further define the mechanisms by which these epigenetic modifications influence tumorigenesis, and this will provide better insight into their prognostic and therapeutic utility. Furthermore, these findings form the foundation for future studies evaluating the clinical efficacy of epigenetic modifications as prognostic biomarkers, as well as potential therapeutic targets.

关键词： Epigenetics Carcinoid Neuroendocrine MicroRNA Methylation Histone modifications Chromatin remodeling LncRNA

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Aphids and their transmitted potato viruses: A continuous challenges in potato crops

引用

Journal of Integrative Agriculture 2020年第2期19卷 367-375页

作者： XU Yi Stewart M.gray Department of Plant Pathology Nanjing Agricultural UniversityNanjing 210095P.R.China Section of Plant Pathology and Plant-Microbe Biology School of Integrated Plant ScienceCornell UniversityIthacaNY 14850USA Emerging Pest and Pathogens Research Unit United States Department of Agriculture–Agricultural Research ServiceIthacaNY 14850USA

Aphid is one of the most destructive insect pests on cultivated plants in temperate *** piercing-sucking mouthparts and phloem feeding behavior directly damage crops and deplete plant ***(Solanum tuberosum L.)is one of the most important food sources on the planet,and several aphid species,e.g.,Myzus persicae(Sulzer)(green peach aphid)and Macrosiphum euphorbiae(thomas)(potato aphid)(Hemiptera:Aphididae)colonize potato and transmit several economically important ***-transmitted potato viruses have been emerging all over the world as a very serious problem in potato production,inducing a wide variety of foliar and tuber symptoms,leading to severe yield reduction and loss of tuber *** this review,recent advances in understanding the interactions of potato viruses with their hosts,aphid vectors and the environment are described.

关键词： aphids virus potato vector transmission

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Recipes for the Derivation of Water Quality Parameters Using the High-Spatial-Resolution Data from Sensors on Board Sentinel-2A,Sentinel-2B,Landsat-5,Landsat-7,Landsat-8,and Landsat-9 Satellites

Journal of Remote Sensing

引用

Journal of Remote Sensing 2023年第1期3卷 213-230页

作者： Juliana Tavora Binbin Jiang thomas Kiffney Guillaume Bourdin Patrick Clifton gray Lino Sander de Carvalho Gabriel Hesketh Kristin M.Schild Luiz Faria de Sousa Damian CBrady Emmanuel Boss Faculty of Geo-Information Science and Earth Observation(ITC) University of TwentePO Box 2177500 AE EnschedeThe Netherlands State Key Laboratory of Marine Geology Tongji UniversityShanghaiChina School of Marine Sciences University of MaineOronoMEUSA Nicholas School of the Environment Duke University Marine LabBeaufortNCUSA Departamento de Meteorologia Universidade Federal do Rio de JaneiroRio de JaneiroBrazil Department of Marine Sciences University of Southern MississippiOcean SpringMSUSA School of Earth and Climate Sciences University of MaineOronoMEUSA Climate Change Institute University of MaineOronoMEUSA

Satellites have provided high-resolution(<100 m)water color(i.e.,remote sensing reflectance)and thermal emission imagery of aquatic environments since the early 1980s;however,global operational water quality products based on these data are not readily available(e.g.,temperature,chlorophyll-a,turbidity,and suspended particle matter).Currently,because of the postprocessing required,only users with expressive experience can exploit these data,limiting their ***,we provide paths(recipes)for the nonspecialist to access and derive water quality products,along with examples of applications,from sensors on board Landsat-5,Landsat-7,Landsat-8,Landsat-9,Sentinel-2A,and *** emphasize that the only assured metric for success in product derivation and the assigning of uncertainties to them is via validation with in situ *** hope that this contribution will motivate nonspecialists to use publicly available high-resolution satellite data to study new processes and monitor a variety of novel environments that have received little attention to date.

关键词： environments Sentinel Spatial

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ROLL MODELS 肥皂盒小车街头大赛

引用

汽车生活 2011年第4期 120-127页

作者： Kevin gray Richard thomas 杨培

在圣弗南度，有着这样的地下街头赛车，参赛的不是超级跑车，而是肥皂箱小车。

关键词：肥皂盒小车超级跑车地下街

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Functional neuroanatomy in panic disorder:Status quo of the research

引用

World Journal of Psychiatry 2017年第1期7卷 12-33页

作者： thomas Sobanski Gerd Wagner Department of Psychiatry Psychotherapyand Psychosomatic MedicineThueringen-Kliniken GmbH Psychiatric Brain and Body Research Group Jena Department of Psychiatry and PsychotherapyJena University Hospital

AIM To provide an overview of the current research in the functional neuroanatomy of panic *** Panic disorder(PD) is a frequent psychiatric disease. Gorman et al(1989; 2000) proposed a comprehensive neuroanatomical model of PD, which suggested that fear-and anxiety-related responses are mediated by a so-called "fear network" which is centered in the amygdala and includes the hippocampus, thalamus, hypothalamus, periaqueductal gray region, locus coeruleus and other brainstem sites. We performed a systematic search by the electronic database PubMed. Thereby, the main focus was laid on recent neurofunctional, neurostructural, and neurochemical studies(from the period between January 2012 and April 2016). Within this frame, special attention was given to the emerging field of imaging genetics. RESULTS We noted that many neuroimaging studies have reinforced the role of the "fear network" regions in the pathophysiology of panic disorder. However, recent functional studies suggest abnormal activation mainly in an extended fear network comprising brainstem, anterior and midcingulate cortex(ACC and MCC), insula, and lateral as well as medial parts of the prefrontal cortex. Interestingly, differences in the amygdala activation were not as consistently reported as one would predict from the hypothesis of Gorman et al(2000). Indeed, amygdala hyperactivation seems to strongly depend on stimuli and experimental paradigms, sample heterogeneity and size, as well as on limitations of neuroimaging techniques. Advanced neurochemical studies have substantiated the major role of serotonergic, noradrenergic and glutamatergic neurotransmission in the pathophysiology of PD. However, alterations of GABAergic function in PD are still a matter of debate and also their specificity remains questionable. A promising new research approach is "imaging genetics". Imaging genetic studies are designed to evaluate the impact of genetic variations(polymorphisms) on cerebral function in reg

关键词： Panic disorder Anterior cingulate cortex Amygdala Insula Functional magnetic resonance imaging Diffusion tensor imaging Voxel-based morphometry Imaging genetics Serotonin Noradrenaline

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Structural effects of reedbed grazing and its cessation on reed-nesting songbird densities

引用

Avian Research 2024年第2期15卷 238-248页

作者： thomas Pagnon Clemence Pechinot Lea Sgro Jeremie Demay Remi Jullian Regis Gallais Brigitte Poulin Cyril Marmoex Theria Ecologie 6 avenue des martyrs05400VeynesFrance UMR 6249 Chrono-Environnement CNRSUniversite de Franche-Comte16 route de Gray25000BesanconFrance Conservatoire d’Espaces Naturels d’Occitanie 26 alle de Mycenes34000MontpellierFrance Office Français de la Biodiversite 12 cours Lumiere94300VincennesFrance Tour du Valat Research Institute for the Conservation of Mediterranean Wetlands Le Sambuc13200ArlesFrance

Reedbeds are crucial breeding habitats for vulnerable songbird *** of their protection status,these habitats may be threatened by organic matter accumulation,progressively leading to structural homoge-nization and habitat succession towards *** prevent excessive litter build-up with various in-terventions opening-up the reedbeds,such as grazing,which may be detrimental or suitable for some reed bird *** assessed the effects of extensive grazing by horses and its cessation in the medium and long terms on reedbed structure,and the consequences on reed-nesting songbird densities in Estagnol Nature Reserve,a pro-tected wetland near the French Mediterranean *** compared reedbed structural features between grazed,newly ungrazed and old-ungrazed *** nine years,we censused four songbird species in spring and collected water level data in the same survey *** reduced reedbed extent,rejuvenated the vegetation with more short green stems on a thinner litter,and produced higher structural heterogeneity and discontinuity compared to long-lasting non *** ungrazed plot showed intermediate *** surveyed songbird total densities were similar among plots while species numbers and densities *** reedbed was more attractive to Moustached Warblers(Acrocephalus melanopogon)and Great Reed Warblers(Acrocephalus arundi-naceus),likely due to the large edges and the high vegetation structural ***,Moustached Warblers were more negatively affected by higher water level in grazed reedbed,presumably because flooding prevents litter *** newly ungrazed reedbed was not preferred by any *** warbler species were found under low density in the old-ungrazed reedbed,where Reed Buntings(Emberiza schoeniclus)were exclu-sively *** availability related to thick litter layer may explain this *** Reed Warblers(Acrocephalus scirpaceus)were found everywhere in similar

关键词： Bird conservation Edge complexity Fragmentation Habitat management Horse grazing Phragmites australis Reed passerine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

microRNA与乳腺癌变

引用

临床与实验病理学杂志 2013年第6期29卷 661-664页

作者：张众 Xiao gray Guishan 石宇李连宏谢丰培大连医科大学病理学教研室大连116044 Creighton University Medical Center USA thomas Jefferson University Hospital USA

乳腺癌变相关microRNA包括肿瘤抑制性与致瘤性两类,前者在癌细胞中表达低于正常细胞,后者对促进细胞增生及抑制细胞分化和(或)凋亡的基因表达加以抑制。mi-croRNA通过调控细胞周期进展、ER、HER、细胞存亡调控分子及其它调控途径(如Sp、... 详细信息

乳腺癌变相关microRNA包括肿瘤抑制性与致瘤性两类,前者在癌细胞中表达低于正常细胞,后者对促进细胞增生及抑制细胞分化和(或)凋亡的基因表达加以抑制。mi-croRNA通过调控细胞周期进展、ER、HER、细胞存亡调控分子及其它调控途径(如Sp、FOXO1等),发挥抑瘤与致瘤作用。乳腺癌变相关microRNA及其靶基因组成相互作用的联网,在乳腺癌形成过程中发挥重要的整体作用。乳腺癌的发生与演进是在表达异常的microRNA作用下乳腺癌干细胞发生与扩增的结果。

关键词：乳腺肿瘤癌变 microRNA

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：